With the market launch of the new A-Class, the new diesel engines from Mercedes-Benz are now available from the compact class to the luxury class. With these engines, Mercedes-Benz vehicles achieve average nitrogen-oxide (NOx) emissions of between 40 and 60 milligrams per kilometre over many thousands of kilometres of driving on the road under the conditions of the Real Driving Emissions (RDE) measuring method.
These emissions are significantly below the RDE limit of 168 milligrams per kilometre. This is made possible by an innovative package of combining engine and exhaust-gas aftertreatment, which has been introduced consistently over the past two years as part of the new generation of engines and is continuously being developed further.
Following the launch of the new generation of diesel engines in the E-Class (four-cylinder OM 654) and the S-Class (six-cylinder OM 656), the four-cylinder OM 608 is being introduced in May in the new A-Class A 180 d (fuel consumption combined: 4,5-4,1 l/100 km combined CO2 emissions: 118-108 g/km). The new diesel engines from Mercedes-Benz are therefore now available from the compact class to the large, luxury class. As is already the case with the OM 654 and OM 656, the OM 608 engine features a compact exhaust-gas aftertreatment system close to the engine as well as multiple exhaust gas recirculation (EGR) with high- and low-pressure EGR, which ensures that average nitrogen-oxide emissions are significantly below the current legal limits of the new RDE test method. For the first time, this model series also features an SCR catalyst with AdBlue® exhaust fluid. Mercedes-Benz now offers this technology in all current vehicle classes.
In the coming months, many more Mercedes-Benz models will be launched that are certified in accordance with Euro 6d-TEMP. By September 2018, more than 30 of the currently available models and more than 200 variants are to be changed over to Euro 6d-TEMP Norm (RDE Stage 1) – a full year before this is mandatory for all vehicles.
“Mercedes-Benz’s new generation of engines already demonstrated two years ago, how the NOx-challenge in Diesel cars can be solved technically. We are fully committed to modern diesel engines as part of the drive mix for the future,” said Ola Källenius, Member of the Board of Management of Daimler AG, responsible for Group Research and Mercedes-Benz Cars Development.
At low levels of engine load, for example while driving slowly, the effectiveness of exhaust-gas aftertreatment can be substantially enhanced due to the close proximity of the system to the engine and further developed exhaust-gas temperature management, thus significantly increasing the system’s effectiveness in the city.